Crowley was selected 1st overall by the Hamilton Nationals in the 2011 MLL Collegiate Draft. After the Hamilton Nationals folded and moved to Florida, Crowley was traded to the Chesapeake Bayhawks in the 2014 season. Crowley is the only player in the history of lacrosse to be drafted first overall in both Major League Lacrosse and National League Lacrosse (Philadelphia Wings).
Crowley was a four year standout at Stony Brook University (N.Y.). As a junior he recorded one of the greatest seasons in Stony Brook men's lacrosse history and just the fourth junior since 1995 to win the Enners Award. As a senior, he was named team captain and became Stony Brook's all-time leader in points (202).
A 2006 graduate of New Westminster Secondary School. Crowley was an MVP of the Provincial playoffs in 2006. Crowley also played basketball, golf, soccer and volleyball.
Crowley was born on November 13, 1988 in New Westminster, British Columbia. Kevin is the son of Warren and Debbie Crowley and has one sister.